Heating system.



V PATENTED' MAR. a F. J. MELTON. HEATING SYSTEM.

APPLICATION FILED APR.6.1907.

UNITED sT TEs FATENT- OFFICE.

FRANK J. MELTON, OF CHICAGO, ILLlNOIS.

EATING srsrEM;

. and 'has' for its object to provide means whereby-b11jldings or other structures may be heated with greater economy, and in a more eflicient manner, than hitherto.

The systemincludes steam heatin appli-' ances, with which are associated air eatmg appliances; the steam and hot air being transmitted through the same pipes to the -ra'diators', 1

. T e ordinary boiler is provided with a seriesof air pipes located inthe steam space of the boiler and also in the breeching and smoke stack, and these pipesare connected onone sideto the main steam supply pipe, 4 and on .the other side to an air tank and compressor, the heated air being su plied under pressure and forced through tiie coils and .thence into the steam pipes and to the radiators in which it circulates with the steam, .the air being at the same, temperature as the steam.

The steam and air are both in thepipes of the system at thesame time, andafter condensation of the steam the wateris returned to the boilers by the pumps in the usual manner and the air escapes through a relief valve in the return pipes.'

The air and steam pipes may be provided with reducing valves so controlled that the proportions of steam and air to be used may e controlled by'the engineer.

- The air coils are so associated with the steam boilers that the large amount of heat which escapes from the ordina steam boiler or furnace is utilized to heat t e air, whereby a great economy of operation is attained.

An embodiment of the invention is illustrated in the accompanying drawings, in

which 'Fi ure 1 is.a sectional view of a art of a buil i to which the system is app ed, the arts o a the system being shown in elevation.

igi 2 is a detail in section.

'eferring s eclfically to thedrawings, the boilers arem icated at 6, of tubular or other suitable construction, and these are con- '55 nected to the'main heating or steam pipe 7,

through which steam is supplied, to the Specification of Letters Patent. Application filed.April 6.1907. Serial No. 366.798.

Batentea March 3, 1908.

radiators 9 by means of branch feedpipes 8. The return pipe is indicated at 10, leading to the water pump 11, which is connected to the boilers by pipe 40, by which water is returned to the boilers. This forms an ordinary steam heating-system.

The boilers are provided with air heating coilsor. pipes." These may be conveniently disposed to utilize the spare. heat of the furnace. Thus I show the pipes at 12,

located in the furnace and connected back and forth to give a large heating area or space; also located in the breeching, as at 13, and in the-steam space of the boilers as indicated at 15. These, coilsand pipes are all connected together to allow a clrculation of air therethrough, the inlet pipe from the air tank being indicated at 16, on one side, and the outlet ipe indicated at 17, leading to the main sup y pipe 7. The air is preferably led direct y from the coils inside the boiler, to the supply pipe, so that the air will be the same temperature as the steam.-

The air is supplied through the pipe 16 from atank 18 which is supplied through a pipe 19 from the air compressor or pump 20 which is operated by steam admittec through a pipe 21 connected by branch pipes 22 to the main steam pipe 7 and the air ipe 16. These branch pipes are provided with equal-, izing valves 23. The return pipe 10 has an air relief valve 24 which allows the escape of the cold air returning through the pipe, the water passing on to the pump.

In 0 eration, the air under pressure is supplied t ou 'h the pipe 16 and passes through various coi s above or around the furnace and is thereby heated to practically the same temperature as the steam, and passes thence with the steam to the radiators where it performs its useful function. The relative amounts of steam and air can be controlled by the use of valves in the different ipes, and in consequence of the location of t e air tubes, as described, a comparatively large body of air is ex osed to the products of combustion, in the hoiler setting, the breeching, and the stack, thereby saving the .heat which would otherwise be Wasted. Of course thesteam system can be used without air if so desired, but the latter will be found to be an efficient aid for heating purposes, a'nd to economize fuel, since the an maybe supplied even while the boilers are not making steam.

The equalizing valves 23 are checked against each other so that if the air pressure is the stronger'it will close or cut off the steam until the'pressures are equalized, or if the steam pressure is the stronger it will close the air and, operate the compressor until the pressures are equalized;

I claim:

1. In a combined steam and air heating system, the combination with a boiler, and. a

main steam pipe leading therefrom, of an air compressor having a pipe connection extend ing through the boiler and to the said steam pipe, a pipe for motive power, connected to the compressor and having branches connected to said air and steam pi es, and check valves which open toward eac other in said. branches. I

2. In a combined steam andair heating system, the'pnmbination with a boiler and exposed intermediately to the heat of the its furnace, and a supply pipe leading from furnace,'a branch pipe from the said supply pipe to the pump, to supply ressure to operate the latter, and abranch 1 econnect- 'ing said last mentioned pipe an t e air ipe,

each of the branch -p1pes' having a c eck valve therein which opens toward the other, to stop the pump when the air pressure equals the steam lpressure.

In testimony W ereof I aflix my signature, in presence of two Witnesses. FRANK J. MELTON Witnesses;

FL RENCE HENDERSON, H. G. BATGHELOBL 

